The Pulley - Simple Machines

This physics video tutorial provides a basic introduction into the pulley - a simple machine that offers a mechanical advantage by increasing the force needed to lift an object through the use of tension acting through a rope.
Contact Forces:
• Calculating Contact Fo...
Tension Force Problems:
• Tension Force Physics ...
Types of Forces:
• How Many Different Typ...
Inclined Planes:
• Introduction to Inclin...
Simple Machines:
• Simple Machines - The ...
_____________________________
Pulley Physics Problems:
• Pulley Physics Problem...
The Pulley - Simple Machines:
• The Pulley - Simple Ma...
The Lever - Simple Machines:
• Simple Machines - The ...
Mechanical Advantage:
• Mechanical Advantage a...
What Is a Force?
• What Is a Force?
______________________________
The 4 Fundamental Forces:
• The Four Fundamental F...
Physics Forces Review:
• Static & Kinetic Frict...
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
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Physics PDF Worksheets:
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[@TheOrganicChemistryTutor]

Physics PDF Worksheets: www.video-tutor.net/physics-basic-introduction.html Full-Length Videos & Exams: www.patreon.com/MathScienceTutor/collections Next Video: kzbin.info/www/bejne/Znm2e6tpeK2NgJY

[@sccm100]

Bruh you helped me throughout college and now studying for the MCAT. Thank you so much

[@jerrysmith9780]

Been a P.Eng. for 25 years and still learn a ton from your videos. Very informative and enjoyable as well as relaxing to watch. Great presentation and style.

[@poopydoggy]

By far the best explanation I could find on KZbin. You addressed the conceptual as well as the mathematical and practical. Thanks!

[@jesushimself2583]

i never took physics in school and regret it so much i need it for work but your videos are the only way im able to teach myself so i would like to say thank you very much for putting your time into this i appreciate it very muhc my friend

[@EmpyreanLightASMR]

Good for you! I did the same thing, watching youtube videos, and then finally jumping into community college classes. Physics is hard, but very rewarding.

[@parjitkhakh6970]

Wonderfully explained, thank you. Mechanical advantage is such an incredible topic.

[@astro6393]

2:25 in order to move the block up by 1 meter, both sides of the rope need to move up by 1m as well, which means the rope itself moves 2m in total... (for my own reference)

[@mrprecious1234]

FANTASTIC!!! Finally, someone took the time to explain in simple terms how mechanical advantage works. Can't tell you how much this helps. THANK YOU for creating this video. Bill

[@jerrywhidby.]

I really want to understand pulleys, but everyone just divides the load between the ropes without explaining how that works. Why does the force needed decrease?

[@Lange007]

If you have an object held by 2 different people. Instinctively, you understand that the load is divided by them.

[@anthonyturbes3907]

Boom

[@extraterrestrialorganism7940]

Isn’t it because if an object in equilibrium under 3 forces, the 3rd force is equal to the sum of the other 2 forces? And if you’re concerned why the load is divided equally, it’s because if not one side of the rope would accelerate downwards due to the unbalanced force. I’m not sure though. I was confused with this too for a long time and this is what I thought is happening. if somebody knows what’s happening accurately please be kind enough to educate me.

[@extraterrestrialorganism7940]

Oh! I just realized it’s because of the same string that goes through the load. We consider the string is massless and non elastic so, If we put F=ma to one side of the string (considering 2 tensions as, T1 & T2), T1-T2=0a, so automatically T1=T2. I’m not still sure though. If you have already found the answer let me know too.

[@Kevin.Simons]

Ok, I finally understand this. Imagine a hike that has two trails to get to the top. One side is a 1 mile hike that is super steep. The other side takes two miles to get to the same place. The longer hike is twice the distance but takes a lot less effort at one time. In the video example here, to raise the weight 1 meter, both sides of the rope connected to the pulley on the right have to come up 1 meter, meaning you have to pull your end of the rope down by 2 meters. It is like taking the less steep version of the hike. You are moving twice as far to get to the same place, but it takes a lot less effort to do so. I know your comment is a year old, but I wanted to type this out so I could get it straight in my own mind haha.

[@richarddiss1643]

AWESOME ! Thank You very much Sir. It is the clearest lesson I'v found so far. Greetings from France ^_^

[@chunkymonkey4868]

I have got finals coming up for my engineering class and simple machines are part of it. Thanks man you really helped me understand how pullies work.

[@CommercialForest]

Excellent explanation of mechanical advantage! 👍 Most videos just announce that 2 pulleys cut the force needed by 1/2 but gloss over the actual phenomenon that everyone is wonders about!

[@Isaiah-ft5nx]

Why do I enjoy this so much?

[@anthonyturbes3907]

Your niche is logging, you don't know that tho

[@MK-wi1bj]

Really i would like to express my thanks for the best explanation with mixing mathematics , logic and practical. thanks again.

[@aryapriyasaha716]

Thank you so much Sir, you cleared all my doubts!

[@animationfactory6206]

Thanks, now i understand in online classes

[@janelonton]

Amazing explanation as always! Thank you!

[@andrerouth4253]

Please look at the video just before 2:56. If a marker on the rope to the left of the fixed pulley moves down 2 centimeters, a marker on the rope to the right of the fixed pulley will have to move up by the same amount (assuming that the rope doesn't stretch, etc). The rope attached directly to the "ceiling" on the right of the Load remains stationary. The simple way to explain the relationship between rope tension and distance traveled is via WORK = Force x Distance. On the rope being pulled on, Input work = 200N x 2cm = 400Ncm. On the Load, Output work = 400N x 1cm = 400Ncm. Please accept my apologies if I misinterpreted what you intended.

[@cameron_moses]

why would anyone dislike this bro it is such a helpful learning video UwU

[@cumsock2085]

Back off of my senpai😡 uwu

[@bradlybellant3975]

This is literally my EGR 102 class probably some annoyed students

[@markizoof7218]

SHUUUUT

[@henokbuchem8695]

Sus daug

[@neilsmith9066]

Because they only believe in Aliens

[@covertelixir3827]

You literally teach better than my physics teacher ty man

[@aruu009]

you helped me SO MUCH. THANK YOU

[@anzelgula3684]

Wonderful explanation. Thank you!

[@zeyansalman4162]

Thanks for this video when I saw this vid I immediately subscribed so helpful and explained in easy word even though I'm just in seven class they are teaching us this

[@prnce_alii]

Jg is the best so like his videos guys and gals

[@SKARTHIKSELVAN]

Thanks for your video.

[@yup_its_patrick]

Great explanation

[@charu2059]

Salute to this guy.

[@chander.261]

this is the magic of physics

[@tomr8761]

Outstanding. thanks for posting.

[@fadumahassan7738]

This is amazing I am grade 4 and it is easy to lean it now

[@djo_shorts6154]

Thank you

[@awantikajha1126]

Hey brother can u tell me how do u decide what to teach next?

[@shysmy19]

He teache madar

[@shysmy19]

Abe saale

[@banny9464]

@@shysmy19 r u Indian ?

[@koushik4777]

It is one of the best inventions of archimedes

[@DragonwithaGirlTattoo]

good point to mention block and tackle en.wikipedia.org/wiki/Block_and_tackle

[@MuhammadAli-fs4nu]

A nicely explained lecture Thanks sir

[@math-matictv9406]

Amazing! More power

[@sujatasawhney788]

Hi, could you be do a video on phasor diagram? Would be of great help.

[@Jackil2307]

Thank you very much, you've really helped me alot❤️👌👌

[@RixtronixLAB]

Cool video, thanks for sharing with us, well done :)

[@ReidoMato]

Very very nice. Thanks.

[@saleemafayaz1662]

Mechanics being taught at a chemistry channel Anyways awesome video Thanks a lot

[@NZC_Meow]

This isn't a chemistry channel lol

[@marvinlee7657]

SIMPLE AND PERSUASIVE !

[@kellyminnesota]

Really great video, and super explanation 👍

[@Dquilic3]

At 1:55, you say the pulley is moving an object that's 400N. But isn't that 400N divided between the two strings suspending the weight? I'm confused because you point out that the 400N downward force is distributed as 200N to each string. When he raises it from the pulley side, he asserts more than 400N to lift the object since the string on the right can't exert an upward force. But what's the point of mentioning the two strings split the weight?

[@ConnorMcCluskey-eq8hl]

i love you videos, looking at this though wouldn't the efficiency =100% how would you equate friction into the equation. if efficiency isn't 100% what have i missed thanks

[@cockers100]

If you add more pulleys (as in the 4 rope example), would you not also be lifting the weight of the additional pulleys, so it becomes less efficient with more pulleys? Or is that nonsense?

[@myfavoriterani9228]

Thank u sir....

[@user-of4cg3om5j]

Does this meant hat the ratio in difference of movement is the same ratio in force needed to move the weight?

[@suzzyazumah9712]

Such a helpful video

[@bintuyt5968]

Thank you 😊😊😊

[@mattthompson2385]

In a more complicated pulley, what do you do in the case if there's a double pulley system where one pulley is inside the other (the pulleys are attached)?

[@johnmcclane4430]

kzbin.info/www/bejne/g2PaZIGQr7Wqha8

[@anyonemyself3590]

@@johnmcclane4430 I just watched Destin's video after watching this one because I didn't originally understand it. And then when I saw this comment I was thinking that's the one Matt should watch too

[@Michelleadeniola]

Thank u so oo oo much❤❤❤❤✨🤲

[@aphelmusonda5253]

Thank you proff.

[@Watersnake777]

Well done.

[@cassismountedgames127]

Ok, I'm kinda confused, wouldn't you count the rope being pulled as a rope, making the first example 3? If not, wouldn't most pullys where you're pulling one end and the other is attached to the object have a mechanical advantage of one dispite being a simple machine??

[@jimmykornelijegunnarsson4265]

Mind elaborating why you can assume the tension to be the same?

[@thatpersonyouknow3747]

Think of the rope as a slinky and you are pulling a weight along a plane. As you pull on the slinky it expands and moves but the weight does not, only when the slinky is fully extended(under tension) will the weight move.

[@jimmykornelijegunnarsson4265]

@@thatpersonyouknow3747 That doesn't explain my question at all. My question is not about the movement (as you describe), but how we partition the tension. How can we assume that the rope attached to the ceiling and the one that follows from the pulley will have the same tension, as in T/N (where N is the given amount of pulleys).

[@lorenchow3244]

It's Newton's 3rd law. The force within the rope has to be equal and opposite to any other part of the rope. Again, assuming no friction forces (such as that associated with the pulley.

[@JacobCormack-v9g]

This can be multiplyed with another pulley right

[@paksauditech.5360]

Sir can we get this mechanical advantage of pulleys closed rope like belt . I mean can we use 1 horsepower motor where a 4 horsepower motor is required

[@godofm3tal1]

But then what does a single pulley without an anchor point on the other side of the load do to the force?

[@spandansenapatib2265]

I have a question. Only a single rope is use here. Then why are we considering its parts that are coiled as individuals.

[@믿음소망사랑-d6i]

기계원리가 대단하십니다

[@maxhagan]

Thank you so much.

[@budwilliams6590]

Pulleys attached to anchors do not give any mechanical advantage thy only give a change of direction. In the first example the mechanical advantage comes from the rope slipping through the eye that is attached to the load. It is acting like a pulley but with a lot of friction. Mechanical advantage only comes from MOVING pulleys.

[@AustinTXRealEstatebyFelix]

200 at Holding or Pulling? + Torque

[@whereisthefood3550]

this is really neat, but just count the ropes assorted with the machine except for the one someone is pulling on. MA right there

[@jamesworful787]

I am trying to set up a similar pulley system to raise and lower the lights in my grow room. But, I am not sure how to space the pulleys so the lights stay level as I raise and lower them. Any help is much appreciated.

[@bittersweetrain1740]

Hmmm.... well for all the lights to rise up and stay level, I recommend being able to pull from both ends so the forces are equalled. Think of it like a drawstring or a curtain except there are a series of pulleys in between. Once all the rope is pulled, the lessening amount of rope should theoretically make them rise. Perhaps space the ones closest to the rope further from the rest of the lights and slowly make them closer to each other as they reach the middle. Why? Well the ropes near the ropes being pulled moves faster than the middle ropes and pulleys.

[@tylerdavis2920]

@TheOrganicChemistryTutor What drawing program do you use for these videos? I would like to know because I plan on using something like this drawing program for KZbin videos. If anyone knows, please reply to this comment

[@caseykang6570]

i dont know his drawing program, but you should try autodesk sketchbook, its really good

[@DamienThorn13]

So less d(distance) = more f(force) == more d(distance = les f(Force)?

[@cameron_moses]

this is super pog ngl

[@cameron_moses]

i agree this is pog

[@jpod4237]

What is pog meaning

[@cameron_moses]

@@jpod4237 cool or awesome

[@jpod4237]

Lttr7 ok

[@kaeya_toast]

pog indeed

[@andabien3]

Question. If I understand correctly, two lines lifting on a given weight multiply the force by two. If I want to move a log, can I stake a line to the ground, run it under and then back over to log, then by pulling on the rope, exert double to force to roll the log alone the ground? Would I not have two line pulling on the log? Thanks.

[@galivinn9133]

You would, an additional amount of force equal to the amount with which you are pulling would be applied to the rope under the log and would be exerted on the stake.

[@gauravjain4597]

could you please let me know, how did you record this video? device and software used?

[@budwilliams6590]

Mechanical advantage = the number of moving pullies * 2. It is a simple equation.

[@YashRaj-pw1mm]

Explain the physics in detail please

[@DJRAJEE]

amazing

[@corby404]

A lot of people count the pulley that redirects the pull as an advantage. Wrong.

[@ja_sh9799]

Thanks bro

[@skk7705]

The profile tho lol

[@MosesMutanuka]

great

[@Bruhinh]

Istg the teacher makes it difficult on purpose

[@tested123]

3 mins in and im out. not on a friday night.

[@anaibarangan4908]

I want to see if has anything to do with how enlightenment in the gravitational magnetics, the pull force in the world works. I think that it's part of the sacred geometry physics of the world. How it all radiates above and around Earth's core. Sitting in a volcano of infrared light force. (That's what donkeys do, heat booties on volcanoes). Connected to sun power and gravitational waves. It feels like leather strap pulley wheels among other ways. Punch holes. More like leather engraving included in carpentry. That's a great way to explain it. That's branch covenant, has romanticized explanations and art.

[@iLLsauce]

Where the ASTB boys at

[@benjackson1109]

why do text books have to make everything so complicated to understand? Thanks Man.

[@juanasanelli6831]

Tantas poleas tienes tanto se multiplica la Ventaja mecanica

[@dudeb.5254]

Dude I have a small request....pls respond to a comment man

[@rengadz1488]

Beatiful content and good quality video. Am waiting for more. I support you because I like your contents not just because you as me to....hope you like mines.

[@user-dt4do4xf3h]

6:32 Why do we use pulleys if the work done by us still the same. Scientific explaination please!.😊

[@cassismountedgames127]

Idk if this helps, but it spreads the work out so even though it's the same amount of work it's much more managable, the work is spread out and you're not putting all that work in at one time even though you're still putting the same amount of work in. It's less effort for the same amount of work.

[@hi-ld4gg]

Someone can pull 10kg for 10m, a lot harder to pull 100kg for 1m

[@jareedaaccount8190]

i love it waw

[@emilie6466]

Not gonna watch this video but uh... that thumbnail does not look like a simple machine

[@brendakitali6924]

Calculate the effort needed to lift the load of 700kg by using pulley

[@reymilortizluis96]

ur not multiplying the force, u r dividing the force by the number of ropes. the man did not get strong(his force is not multiplied) the man use less force bcoz the force is divided/distributed to the other ropes

[@dunnkruger8825]

240,000 views 240,000 times a misleading conclusion 1 Pulley in a fixed position as shown is a simple REDIRECT ADD a pulley at the weight, I.e., a pulley upward with the weight THEN the force as shown is approximately HALVED Numbers thrown out there are very large impressive even if missing a pulley DO THE VALIDATION MECHANICALLY DUDES

[@dzindzindzin]

wow puley is. god....

[@jareerahmadleel4314]

Sir kindly add the subject name before the topic name...... For example if the topic is the pulley..... It should be written as Physics: The Pulley...... So the subscribers will easily understand that this topic belongs to physics....

[@jaredloveless]

This feels like the physics version of your vs you're.

[@dunnkruger8825]

Example 2 There are 5 ropes Not 4

[@rajeshpavan7115]

Wow

[@deimoz6000]

4000th like les go

[@dinindu9941]

Why my science teacher made this so hard for me to understand? 😢😢😢

[@jakebackpack8292]

You’re my fucking boi